Surname List: Begins with O


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All surnames beginning with O, sorted alphabetically (total individuals):

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1. o 'Beolan (2)
2. o 'Brien (1)
3. o' Bannon (1)
4. o' Bell (9)
5. o' Beolain (1)
6. o' Boyle (1)
7. o' Breen (18)
8. o' Brennan (1)
9. o' Brian (12)
10. o' Brien (225)
11. o' Brien de Thomond (3)
12. o' Brien-Ara (1)
13. o' Bryan (5)
14. o' Bryen (4)
15. o' Byrne (4)
16. o' Caerbhaill (1)
17. o' Cahan (5)
18. o' Callaghan (35)
19. o' Carrol (1)
20. o' Carroll (7)
21. o' Cavanagh (2)
22. o' Cearbhall (2)
23. o' Cheinnselaig (14)
24. o' Chennselaig (1)
25. o' Chorb (1)
26. o' Chuind (1)
27. o' Conaing (1)
28. o' Connell (60)
29. o' Conner (1)
30. o' Conners (1)
31. o' Connor (61)
32. o' Connor-Kerry (1)
33. o' Connough (2)
34. o' Conor (6)
35. o' Conor Sligo (1)
36. o' Crega (1)
37. o' Cuillen (1)
38. o' Daire Rainey (1)
39. o' Dea (2)
40. o' Dell (5)
41. o' Dennel (1)
42. o' Docherty (2)
43. o' Donell (1)
44. o' Donnagan (1)
45. o' Donnel (1)
46. o' Donnell (53)
47. o' Donnell von Tyrconell (3)
48. o' Donnell von Tyrconnell (3)
49. o' Donoghue (1)
50. o' Donovan (3)
51. o' Draine (1)
52. o' Duibhne (1)
53. o' Dungalaig (1)
54. o' Duraghy (1)
55. o' Eagra (1)
56. o' Eidin (1)
57. o' Fallon (2)
58. o' Faolain (2)
59. o' Farrell (2)
60. o' Felan (1)
61. o' Ferral (1)
62. o' Ferrall-Boy (2)
63. o' Flaherty (4)
64. o' Fogarty (1)
65. o' Fogurty (1)
66. o' Garvey (2)
67. o' Grady (41)
68. o' Hagan (3)
69. o' Halloran (1)
70. o' Hara (28)
71. o' Hartigan (1)
72. o' Hea (1)
73. o' Hegerty (4)
74. o' Kane (2)
75. o' Keefe (6)
76. o' Keeff (1)
77. o' Keeley (3)
78. o' Kelly (6)
79. o' Kennedy (8)
80. o' Key (1)
81. o' Killey (1)
82. o' Knightley (2)
83. o' Lalor (1)
84. o' Lavery (2)
85. o' Leary (6)
86. o' Lorcain (1)
87. o' Loughnan (1)
88. o' Madden (2)
89. o' Mahony (1)
90. o' Maille Owen (1)
91. o' Maillend (3)
92. o' Malia (1)
93. o' Malley (3)
94. o' Mara (10)
95. o' Meagber (1)
96. o' Mealy (1)
97. o' Melaghlin (5)
98. o' Moore (14)
99. o' Morda (1)
100. o' More (5)
101. o' Mullane (1)
102. o' Mulloy (1)
103. o' Mulyran (1)
104. o' Murphy (1)
105. o' Neal (11)
106. o' Neale (4)
107. o' Neall (9)
108. o' Neil (3)
109. o' Néill (115)
110. o' Neill de Tyrone (1)
111. o' Nolan (1)
112. o' Phelan (1)
113. o' Pluingceid (1)
114. o' Quin (1)
115. o' Rear (1)
116. o' Regan (1)
117. o' Reilly (6)
118. o' Rorke (5)
119. o' Rourk (2)
120. o' Rourke (1)
121. o' Ruarc (5)
122. o' Ryn (1)
123. o' Shaughnessy (7)
124. o' Shea (1)
125. o' Sullivan (26)
126. o' Sullivan Beare (2)
127. o' Tard la Grange-Keith (1)
128. o' Toole (16)
129. O'Blennis (1)
130. Oachs (4)
131. Oadham (2)
132. Oak (1)
133. Oakden (1)
134. Oakes (33)
135. Oakey (5)
136. Oakleaf (1)
137. Oakley (16)
138. Oaks (6)
139. Oates (7)
140. Obachah (1)
141. Obama (5)
142. Obanion (1)
143. Obbard (1)
144. Obbema (1)
145. Obbens (1)
146. Obdam (1)
147. Obedience (1)
148. Obelink (1)
149. Obelitz (1)
150. Obell (1)
151. Oben (2)
152. Obenberg (1)
153. Obeniche (1)
154. Ober (7)
155. Oberacker zu Sieghartsstein (1)
156. Oberembt (2)
157. Oberhlotzer (1)
158. Oberholster (16)
159. Oberholzer (6)
160. Oberje (2)
161. Oberländer (4)
162. Oberleuter von Lassing (1)
163. Oberlin (2)
164. Obermair (2)
165. Obermayer (2)
166. Obermeyer (1)
167. Obernaür (1)
168. Oberstadt (1)
169. Obertacke (1)
170. Oberti (2)
171. Obijn (1)
172. Obolenska (1)
173. Obolenskaia (1)
174. Obolenskaja (1)
175. Obolensky (18)
176. Obolensky-Neledinsky-Meletzky (4)
177. Oboussier (1)
178. Obreen (2)
179. Obrenović (7)
180. Obrenovic (7)
181. Obrist (1)
182. Obukova (1)
183. Occo (2)
184. Och (2)
185. Ochoa de Ondategui (2)
186. Ochs von Gunzendorf (2)
187. Ochs von Sonnau & Reichersperg (2)
188. Ochsin von Gunzendorf (1)
189. Ochterlony (3)
190. Ocieska (1)
191. Ockel (2)
192. Ockens (4)
193. Ockers (14)
194. Ockers Cau (2)
195. Ockerse (7)
196. Ockersse (27)
197. Ockerz. (1)
198. Ockes (2)
199. Ockhorst (4)
200. Ockhuysen (1)
201. Ockinga (5)
202. Ockstee (1)
203. Ocskay de Ocsko (1)
204. Octavius (1)
205. Octon (1)
206. Odard (1)
207. Odart (5)
208. Odart de Rilly d'Oysonville (1)
209. Odberre (1)
210. Odde (1)
211. Oddie (6)
212. Odding (2)
213. Oddyle (2)
214. Odé (1)
215. Odekerken (1)
216. Odell (18)
217. Odendaal (21)
218. Odendahl (1)
219. Odenhoven (1)
220. Odenthal (1)
221. Oder (3)
222. Odescalchi (29)
223. Odescalchi di Novara (1)
224. Odet (1)
225. Odette (1)
226. Odgers (1)
227. Odier (2)
228. Odijk (1)
229. Odilia (1)
230. Odinck (1)
231. Odingsells (3)
232. Odink (1)
233. Odino (1)
234. Odinot (2)
235. Odinsson (1)
236. Odiorne (1)
237. Odland (4)
238. Odling (1)
239. Odlum (2)
240. Odoe (1)
241. Odoevskaya (2)
242. Odoevsky (1)
243. Odom (4)
244. Odone (4)
245. Odor (1)
246. Odou (1)
247. Odoyevskaya (1)
248. Odrowazowna (1)
249. Odson (1)
250. Odum (1)
251. Odygd (3)
252. Oechslin (1)
253. Oedses (1)
254. Oedtsma (3)
255. Oedtsma van Juckema (3)
256. Oeheim (2)
257. Oehler (1)
258. Oehlmann (1)
259. Oehninger (1)
260. Oeijen (1)
261. Oelbermann (1)
262. Oeler (5)
263. Oelhafen (1)
264. Oeloffse (1)
265. Oelofse (17)
266. Oelrichs (5)
267. Oelwein (1)
268. Oem (77)
269. Oem van Arkel (1)
270. Oem van Bochoven (6)
271. Oem van Bockhoven (1)
272. Oem van Bokhoven (5)
273. Oem van Papendrecht (1)
274. Oem van Wijngaarden (34)
275. Oem van Wijngaerden (7)
276. Oem van Wyngaerden (1)
277. Oem van Zevender (2)
278. Oemcens (1)
279. Oenema (4)
280. Oentses (1)
281. Oepkes (2)
282. Oerinck (1)
283. Oerlemans (3)
284. Oertgen (2)
285. Oerthling (1)
286. Oertwein (2)
287. Oertwin (1)
   288. Oesau (31)
289. Oesebrand (1)
290. Oeser (2)
291. Oessendorff (1)
292. Oest (9)
293. Oesterberg (1)
294. Oesterlen (1)
295. Oesterling (1)
296. Oestermann (3)
297. Oesters (1)
298. Oesterschmidt (1)
299. Oestherhaut (1)
300. Oeteren (1)
301. Oeters van Maris (1)
302. Oetgens (10)
303. Oetgens van Waveren (5)
304. Oetgens van Waveren Pancras Clifford (16)
305. Oetgins (2)
306. Oetinger (2)
307. Oetker (9)
308. Oettingen (3)
309. Oettingen Ettinger-Halevi (1)
310. Oevermans (1)
311. Oexle von Friedenberg (1)
312. of Acre (1)
313. of Acton (2)
314. of Agade (2)
315. of Ailech (1)
316. of Albha (1)
317. of Alcester (1)
318. of Aleppo (1)
319. of Allardice (1)
320. of Aller (4)
321. of Allerdale (1)
322. of Anathoth (1)
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326. of Angus (16)
327. of Antioch (1)
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329. of Argyll (3)
330. of Argyllshire (12)
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332. of Armorica (2)
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335. of Athol (5)
336. of Atholl (6)
337. of Babylon (5)
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346. of Bernica (16)
347. of Bernicia (4)
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355. of Braytoft (1)
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357. of Bristol (1)
358. of Britons (1)
359. of Brittany (1)
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361. of Buchan (2)
362. of Bulgaria (1)
363. of Burlington (1)
364. of Caithness (7)
365. of Callendar (3)
366. of Cambridge (11)
367. of Cardigan (1)
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370. of Carrick (7)
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372. of Chattan (10)
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377. of Cimmerians (11)
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379. of Clarence (4)
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382. of Connaught (4)
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384. of Cornwall (28)
385. of Cranntock (1)
386. of Cumbria (2)
387. of Dalradia (6)
388. of Deheubarth (1)
389. of Deira (2)
390. of Denia & Balearic (1)
391. of Denmark (2)
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393. of Devon (3)
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396. of Dol (5)
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398. of Douni (2)
399. of Draffen (1)
400. of Dublin (9)
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402. of Dull (1)
403. of Dunbar (23)
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405. of Dyfed (4)
406. of East Anglia (11)
407. of Eccles (2)
408. of Egypt (11)
409. of England (80)
410. of Essex (4)
411. of Ethod (1)
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414. of Fife (5)
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423. of Galicia (3)
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427. of Gibeah (2)
428. of Gilsland (3)
429. of Gloucester (13)
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450. of Ireland (14)
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454. of Italy (2)
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458. of Judah (18)
459. of Jutland (3)
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478. of Libnah (1)
479. of Lincoln (3)
480. of Loarn (1)
481. of Lochaber (8)
482. of Lochore (1)
483. of Lorn (6)
484. of Lot (2)
485. of Lumley (7)
486. of Lundy (1)
487. of Luss (2)
488. of Lyon Logie (1)
489. of Macedonia (1)
490. of Man (5)
491. of Man & Dublin & the Isles (1)
492. of Mar (6)
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495. of Meirionydd (2)
496. of Menteith (2)
497. of Menteth (2)
498. of Mercia (71)
499. of Mexico (2)
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502. of Moab (2)
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519. of Northumberland (7)
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524. of Orbe, Switzerland (1)
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549. of Sanford (3)
550. of Scotland (73)
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558. of Sicambri (15)
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569. of Stra... (2)
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571. of Strathclyde (14)
572. of Strathearn (21)
573. of Strathnaver (2)
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